/*!
 * Viewer.js v1.0.0
 * https://github.com/fengyuanchen/viewerjs
 *
 * Copyright (c) 2015-2018 Chen Fengyuan
 * Released under the MIT license
 *
 * Date: 2018-04-01T05:33:18.955Z
 */

(function (global, factory) {
    typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
    typeof define === 'function' && define.amd ? define(factory) :
    (global.Viewer = factory());
  }(this, (function () { 'use strict';
  
    var DEFAULTS = {
      // Enable inline mode
      inline: false,
  
      // Show the button on the top-right of the viewer
      button: true,
  
      // Show the navbar
      navbar: true,
  
      // Show the title
      title: true,
  
      // Show the toolbar
      toolbar: true,
  
      // Show the tooltip with image ratio (percentage) when zoom in or zoom out
      tooltip: true,
  
      // Enable to move the image
      movable: true,
  
      // Enable to zoom the image
      zoomable: true,
  
      // Enable to rotate the image
      rotatable: true,
  
      // Enable to scale the image
      scalable: true,
  
      // Enable CSS3 Transition for some special elements
      transition: true,
  
      // Enable to request fullscreen when play
      fullscreen: true,
  
      // The amount of time to delay between automatically cycling an image when playing.
      interval: 5000,
  
      // Enable keyboard support
      keyboard: true,
  
      // Enable a modal backdrop, specify `static` for a backdrop which doesn't close the modal on click
      backdrop: true,
  
      // Indicate if show a loading spinner when load image or not.
      loading: true,
  
      // Indicate if enable loop viewing or not.
      loop: true,
  
      // Min width of the viewer in inline mode
      minWidth: 200,
  
      // Min height of the viewer in inline mode
      minHeight: 100,
  
      // Define the ratio when zoom the image by wheeling mouse
      zoomRatio: 0.1,
  
      // Define the min ratio of the image when zoom out
      minZoomRatio: 0.01,
  
      // Define the max ratio of the image when zoom in
      maxZoomRatio: 100,
  
      // Define the CSS `z-index` value of viewer in modal mode.
      zIndex: 2015,
  
      // Define the CSS `z-index` value of viewer in inline mode.
      zIndexInline: 0,
  
      // Define where to get the original image URL for viewing
      // Type: String (an image attribute) or Function (should return an image URL)
      url: 'src',
  
      // Define where to put the viewer in modal mode.
      // Type: String | Element
      container: 'body',
  
      // Filter the images for viewing.
      // Type: Function (return true if the image is viewable)
      filter: null,
  
      // Event shortcuts
      ready: null,
      show: null,
      shown: null,
      hide: null,
      hidden: null,
      view: null,
      viewed: null
    };
  
    var TEMPLATE = '<div class="viewer-container" touch-action="none">' + '<div class="viewer-canvas"></div>' + '<div class="viewer-footer">' + '<div class="viewer-title"></div>' + '<div class="viewer-toolbar"></div>' + '<div class="viewer-navbar">' + '<ul class="viewer-list"></ul>' + '</div>' + '</div>' + '<div class="viewer-tooltip"></div>' + '<div role="button" class="viewer-button" data-action="mix"></div>' + '<div class="viewer-player"></div>' + '</div>';
  
    var IN_BROWSER = typeof window !== 'undefined';
    var WINDOW = IN_BROWSER ? window : {};
    var NAMESPACE = 'viewer';
  
    // Actions
    var ACTION_MOVE = 'move';
    var ACTION_SWITCH = 'switch';
    var ACTION_ZOOM = 'zoom';
  
    // Classes
    var CLASS_ACTIVE = NAMESPACE + '-active';
    var CLASS_CLOSE = NAMESPACE + '-close';
    var CLASS_FADE = NAMESPACE + '-fade';
    var CLASS_FIXED = NAMESPACE + '-fixed';
    var CLASS_FULLSCREEN = NAMESPACE + '-fullscreen';
    var CLASS_FULLSCREEN_EXIT = NAMESPACE + '-fullscreen-exit';
    var CLASS_HIDE = NAMESPACE + '-hide';
    var CLASS_HIDE_MD_DOWN = NAMESPACE + '-hide-md-down';
    var CLASS_HIDE_SM_DOWN = NAMESPACE + '-hide-sm-down';
    var CLASS_HIDE_XS_DOWN = NAMESPACE + '-hide-xs-down';
    var CLASS_IN = NAMESPACE + '-in';
    var CLASS_INVISIBLE = NAMESPACE + '-invisible';
    var CLASS_LOADING = NAMESPACE + '-loading';
    var CLASS_MOVE = NAMESPACE + '-move';
    var CLASS_OPEN = NAMESPACE + '-open';
    var CLASS_SHOW = NAMESPACE + '-show';
    var CLASS_TRANSITION = NAMESPACE + '-transition';
  
    // Events
    var EVENT_READY = 'ready';
    var EVENT_SHOW = 'show';
    var EVENT_SHOWN = 'shown';
    var EVENT_HIDE = 'hide';
    var EVENT_HIDDEN = 'hidden';
    var EVENT_VIEW = 'view';
    var EVENT_VIEWED = 'viewed';
    var EVENT_CLICK = 'click';
    var EVENT_DRAG_START = 'dragstart';
    var EVENT_KEY_DOWN = 'keydown';
    var EVENT_LOAD = 'load';
    var EVENT_POINTER_DOWN = WINDOW.PointerEvent ? 'pointerdown' : 'touchstart mousedown';
    var EVENT_POINTER_MOVE = WINDOW.PointerEvent ? 'pointermove' : 'touchmove mousemove';
    var EVENT_POINTER_UP = WINDOW.PointerEvent ? 'pointerup pointercancel' : 'touchend touchcancel mouseup';
    var EVENT_RESIZE = 'resize';
    var EVENT_TRANSITION_END = 'transitionend';
    var EVENT_WHEEL = 'wheel mousewheel DOMMouseScroll';
  
    var BUTTONS = ['zoom-in', 'zoom-out', 'one-to-one', 'reset', 'prev', 'play', 'next', 'rotate-left', 'rotate-right', 'flip-horizontal', 'flip-vertical'];
  
    var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) {
      return typeof obj;
    } : function (obj) {
      return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
    };
  
    var classCallCheck = function (instance, Constructor) {
      if (!(instance instanceof Constructor)) {
        throw new TypeError("Cannot call a class as a function");
      }
    };
  
    var createClass = function () {
      function defineProperties(target, props) {
        for (var i = 0; i < props.length; i++) {
          var descriptor = props[i];
          descriptor.enumerable = descriptor.enumerable || false;
          descriptor.configurable = true;
          if ("value" in descriptor) descriptor.writable = true;
          Object.defineProperty(target, descriptor.key, descriptor);
        }
      }
  
      return function (Constructor, protoProps, staticProps) {
        if (protoProps) defineProperties(Constructor.prototype, protoProps);
        if (staticProps) defineProperties(Constructor, staticProps);
        return Constructor;
      };
    }();
  
    /**
     * Check if the given value is a string.
     * @param {*} value - The value to check.
     * @returns {boolean} Returns `true` if the given value is a string, else `false`.
     */
    function isString(value) {
      return typeof value === 'string';
    }
  
    /**
     * Check if the given value is not a number.
     */
    var isNaN = Number.isNaN || WINDOW.isNaN;
  
    /**
     * Check if the given value is a number.
     * @param {*} value - The value to check.
     * @returns {boolean} Returns `true` if the given value is a number, else `false`.
     */
    function isNumber(value) {
      return typeof value === 'number' && !isNaN(value);
    }
  
    /**
     * Check if the given value is undefined.
     * @param {*} value - The value to check.
     * @returns {boolean} Returns `true` if the given value is undefined, else `false`.
     */
    function isUndefined(value) {
      return typeof value === 'undefined';
    }
  
    /**
     * Check if the given value is an object.
     * @param {*} value - The value to check.
     * @returns {boolean} Returns `true` if the given value is an object, else `false`.
     */
    function isObject(value) {
      return (typeof value === 'undefined' ? 'undefined' : _typeof(value)) === 'object' && value !== null;
    }
  
    var hasOwnProperty = Object.prototype.hasOwnProperty;
  
    /**
     * Check if the given value is a plain object.
     * @param {*} value - The value to check.
     * @returns {boolean} Returns `true` if the given value is a plain object, else `false`.
     */
  
    function isPlainObject(value) {
      if (!isObject(value)) {
        return false;
      }
  
      try {
        var _constructor = value.constructor;
        var prototype = _constructor.prototype;
  
  
        return _constructor && prototype && hasOwnProperty.call(prototype, 'isPrototypeOf');
      } catch (e) {
        return false;
      }
    }
  
    /**
     * Check if the given value is a function.
     * @param {*} value - The value to check.
     * @returns {boolean} Returns `true` if the given value is a function, else `false`.
     */
    function isFunction(value) {
      return typeof value === 'function';
    }
  
    /**
     * Iterate the given data.
     * @param {*} data - The data to iterate.
     * @param {Function} callback - The process function for each element.
     * @returns {*} The original data.
     */
    function forEach(data, callback) {
      if (data && isFunction(callback)) {
        if (Array.isArray(data) || isNumber(data.length) /* array-like */) {
            var length = data.length;
  
            var i = void 0;
  
            for (i = 0; i < length; i += 1) {
              if (callback.call(data, data[i], i, data) === false) {
                break;
              }
            }
          } else if (isObject(data)) {
          Object.keys(data).forEach(function (key) {
            callback.call(data, data[key], key, data);
          });
        }
      }
  
      return data;
    }
  
    /**
     * Extend the given object.
     * @param {*} obj - The object to be extended.
     * @param {*} args - The rest objects which will be merged to the first object.
     * @returns {Object} The extended object.
     */
    var assign = Object.assign || function assign(obj) {
      for (var _len = arguments.length, args = Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
        args[_key - 1] = arguments[_key];
      }
  
      if (isObject(obj) && args.length > 0) {
        args.forEach(function (arg) {
          if (isObject(arg)) {
            Object.keys(arg).forEach(function (key) {
              obj[key] = arg[key];
            });
          }
        });
      }
  
      return obj;
    };
  
    var REGEXP_SUFFIX = /^(?:width|height|left|top|marginLeft|marginTop)$/;
  
    /**
     * Apply styles to the given element.
     * @param {Element} element - The target element.
     * @param {Object} styles - The styles for applying.
     */
    function setStyle(element, styles) {
      var style = element.style;
  
  
      forEach(styles, function (value, property) {
        if (REGEXP_SUFFIX.test(property) && isNumber(value)) {
          value += 'px';
        }
  
        style[property] = value;
      });
    }
  
    /**
     * Check if the given element has a special class.
     * @param {Element} element - The element to check.
     * @param {string} value - The class to search.
     * @returns {boolean} Returns `true` if the special class was found.
     */
    function hasClass(element, value) {
      return element.classList ? element.classList.contains(value) : element.className.indexOf(value) > -1;
    }
  
    /**
     * Add classes to the given element.
     * @param {Element} element - The target element.
     * @param {string} value - The classes to be added.
     */
    function addClass(element, value) {
      if (!value) {
        return;
      }
  
      if (isNumber(element.length)) {
        forEach(element, function (elem) {
          addClass(elem, value);
        });
        return;
      }
  
      if (element.classList) {
        element.classList.add(value);
        return;
      }
  
      var className = element.className.trim();
  
      if (!className) {
        element.className = value;
      } else if (className.indexOf(value) < 0) {
        element.className = className + ' ' + value;
      }
    }
  
    /**
     * Remove classes from the given element.
     * @param {Element} element - The target element.
     * @param {string} value - The classes to be removed.
     */
    function removeClass(element, value) {
      if (!value) {
        return;
      }
  
      if (isNumber(element.length)) {
        forEach(element, function (elem) {
          removeClass(elem, value);
        });
        return;
      }
  
      if (element.classList) {
        element.classList.remove(value);
        return;
      }
  
      if (element.className.indexOf(value) >= 0) {
        element.className = element.className.replace(value, '');
      }
    }
  
    /**
     * Add or remove classes from the given element.
     * @param {Element} element - The target element.
     * @param {string} value - The classes to be toggled.
     * @param {boolean} added - Add only.
     */
    function toggleClass(element, value, added) {
      if (!value) {
        return;
      }
  
      if (isNumber(element.length)) {
        forEach(element, function (elem) {
          toggleClass(elem, value, added);
        });
        return;
      }
  
      // IE10-11 doesn't support the second parameter of `classList.toggle`
      if (added) {
        addClass(element, value);
      } else {
        removeClass(element, value);
      }
    }
  
    var REGEXP_HYPHENATE = /([a-z\d])([A-Z])/g;
  
    /**
     * Transform the given string from camelCase to kebab-case
     * @param {string} value - The value to transform.
     * @returns {string} The transformed value.
     */
    function hyphenate(value) {
      return value.replace(REGEXP_HYPHENATE, '$1-$2').toLowerCase();
    }
  
    /**
     * Get data from the given element.
     * @param {Element} element - The target element.
     * @param {string} name - The data key to get.
     * @returns {string} The data value.
     */
    function getData(element, name) {
      if (isObject(element[name])) {
        return element[name];
      } else if (element.dataset) {
        return element.dataset[name];
      }
  
      return element.getAttribute('data-' + hyphenate(name));
    }
  
    /**
     * Set data to the given element.
     * @param {Element} element - The target element.
     * @param {string} name - The data key to set.
     * @param {string} data - The data value.
     */
    function setData(element, name, data) {
      if (isObject(data)) {
        element[name] = data;
      } else if (element.dataset) {
        element.dataset[name] = data;
      } else {
        element.setAttribute('data-' + hyphenate(name), data);
      }
    }
  
    /**
     * Remove data from the given element.
     * @param {Element} element - The target element.
     * @param {string} name - The data key to remove.
     */
    function removeData(element, name) {
      if (isObject(element[name])) {
        try {
          delete element[name];
        } catch (e) {
          element[name] = undefined;
        }
      } else if (element.dataset) {
        // #128 Safari not allows to delete dataset property
        try {
          delete element.dataset[name];
        } catch (e) {
          element.dataset[name] = undefined;
        }
      } else {
        element.removeAttribute('data-' + hyphenate(name));
      }
    }
  
    var REGEXP_SPACES = /\s\s*/;
    var onceSupported = function () {
      var supported = false;
  
      if (IN_BROWSER) {
        var once = false;
        var listener = function listener() {};
        var options = Object.defineProperty({}, 'once', {
          get: function get$$1() {
            supported = true;
            return once;
          },
  
  
          /**
           * This setter can fix a `TypeError` in strict mode
           * {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Getter_only}
           * @param {boolean} value - The value to set
           */
          set: function set$$1(value) {
            once = value;
          }
        });
  
        WINDOW.addEventListener('test', listener, options);
        WINDOW.removeEventListener('test', listener, options);
      }
  
      return supported;
    }();
  
    /**
     * Remove event listener from the target element.
     * @param {Element} element - The event target.
     * @param {string} type - The event type(s).
     * @param {Function} listener - The event listener.
     * @param {Object} options - The event options.
     */
    function removeListener(element, type, listener) {
      var options = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : {};
  
      var handler = listener;
  
      type.trim().split(REGEXP_SPACES).forEach(function (event) {
        if (!onceSupported) {
          var listeners = element.listeners;
  
  
          if (listeners && listeners[event] && listeners[event][listener]) {
            handler = listeners[event][listener];
            delete listeners[event][listener];
  
            if (Object.keys(listeners[event]).length === 0) {
              delete listeners[event];
            }
  
            if (Object.keys(listeners).length === 0) {
              delete element.listeners;
            }
          }
        }
  
        element.removeEventListener(event, handler, options);
      });
    }
  
    /**
     * Add event listener to the target element.
     * @param {Element} element - The event target.
     * @param {string} type - The event type(s).
     * @param {Function} listener - The event listener.
     * @param {Object} options - The event options.
     */
    function addListener(element, type, listener) {
      var options = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : {};
  
      var _handler = listener;
  
      type.trim().split(REGEXP_SPACES).forEach(function (event) {
        if (options.once && !onceSupported) {
          var _element$listeners = element.listeners,
              listeners = _element$listeners === undefined ? {} : _element$listeners;
  
  
          _handler = function handler() {
            for (var _len2 = arguments.length, args = Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
              args[_key2] = arguments[_key2];
            }
  
            delete listeners[event][listener];
            element.removeEventListener(event, _handler, options);
            listener.apply(element, args);
          };
  
          if (!listeners[event]) {
            listeners[event] = {};
          }
  
          if (listeners[event][listener]) {
            element.removeEventListener(event, listeners[event][listener], options);
          }
  
          listeners[event][listener] = _handler;
          element.listeners = listeners;
        }
  
        element.addEventListener(event, _handler, options);
      });
    }
  
    /**
     * Dispatch event on the target element.
     * @param {Element} element - The event target.
     * @param {string} type - The event type(s).
     * @param {Object} data - The additional event data.
     * @returns {boolean} Indicate if the event is default prevented or not.
     */
    function dispatchEvent(element, type, data) {
      var event = void 0;
  
      // Event and CustomEvent on IE9-11 are global objects, not constructors
      if (isFunction(Event) && isFunction(CustomEvent)) {
        event = new CustomEvent(type, {
          detail: data,
          bubbles: true,
          cancelable: true
        });
      } else {
        event = document.createEvent('CustomEvent');
        event.initCustomEvent(type, true, true, data);
      }
  
      return element.dispatchEvent(event);
    }
  
    /**
     * Get the offset base on the document.
     * @param {Element} element - The target element.
     * @returns {Object} The offset data.
     */
    function getOffset(element) {
      var box = element.getBoundingClientRect();
  
      return {
        left: box.left + (window.pageXOffset - document.documentElement.clientLeft),
        top: box.top + (window.pageYOffset - document.documentElement.clientTop)
      };
    }
  
    /**
     * Get transforms base on the given object.
     * @param {Object} obj - The target object.
     * @returns {string} A string contains transform values.
     */
    function getTransforms(_ref) {
      var rotate = _ref.rotate,
          scaleX = _ref.scaleX,
          scaleY = _ref.scaleY,
          translateX = _ref.translateX,
          translateY = _ref.translateY;
  
      var values = [];
  
      if (isNumber(translateX) && translateX !== 0) {
        values.push('translateX(' + translateX + 'px)');
      }
  
      if (isNumber(translateY) && translateY !== 0) {
        values.push('translateY(' + translateY + 'px)');
      }
  
      // Rotate should come first before scale to match orientation transform
      if (isNumber(rotate) && rotate !== 0) {
        values.push('rotate(' + rotate + 'deg)');
      }
  
      if (isNumber(scaleX) && scaleX !== 1) {
        values.push('scaleX(' + scaleX + ')');
      }
  
      if (isNumber(scaleY) && scaleY !== 1) {
        values.push('scaleY(' + scaleY + ')');
      }
  
      var transform = values.length ? values.join(' ') : 'none';
  
      return {
        WebkitTransform: transform,
        msTransform: transform,
        transform: transform
      };
    }
  
    /**
     * Get an image name from an image url.
     * @param {string} url - The target url.
     * @example
     * // picture.jpg
     * getImageNameFromURL('http://domain.com/path/to/picture.jpg?size=1280×960')
     * @returns {string} A string contains the image name.
     */
    function getImageNameFromURL(url) {
      return isString(url) ? url.replace(/^.*\//, '').replace(/[?&#].*$/, '') : '';
    }
  
    var IS_SAFARI = WINDOW.navigator && /(Macintosh|iPhone|iPod|iPad).*AppleWebKit/i.test(WINDOW.navigator.userAgent);
  
    /**
     * Get an image's natural sizes.
     * @param {string} image - The target image.
     * @param {Function} callback - The callback function.
     * @returns {HTMLImageElement} The new image.
     */
    function getImageNaturalSizes(image, callback) {
      var newImage = document.createElement('img');
  
      // Modern browsers (except Safari)
      if (image.naturalWidth && !IS_SAFARI) {
        callback(image.naturalWidth, image.naturalHeight);
        return newImage;
      }
  
      var body = document.body || document.documentElement;
  
      newImage.onload = function () {
        callback(newImage.width, newImage.height);
  
        if (!IS_SAFARI) {
          body.removeChild(newImage);
        }
      };
  
      newImage.src = image.src;
  
      // iOS Safari will convert the image automatically
      // with its orientation once append it into DOM
      if (!IS_SAFARI) {
        newImage.style.cssText = 'left:0;' + 'max-height:none!important;' + 'max-width:none!important;' + 'min-height:0!important;' + 'min-width:0!important;' + 'opacity:0;' + 'position:absolute;' + 'top:0;' + 'z-index:-1;';
        body.appendChild(newImage);
      }
  
      return newImage;
    }
  
    /**
     * Get the related class name of a responsive type number.
     * @param {string} type - The responsive type.
     * @returns {string} The related class name.
     */
    function getResponsiveClass(type) {
      switch (type) {
        case 2:
          return CLASS_HIDE_XS_DOWN;
  
        case 3:
          return CLASS_HIDE_SM_DOWN;
  
        case 4:
          return CLASS_HIDE_MD_DOWN;
  
        default:
          return '';
      }
    }
  
    /**
     * Get the max ratio of a group of pointers.
     * @param {string} pointers - The target pointers.
     * @returns {number} The result ratio.
     */
    function getMaxZoomRatio(pointers) {
      var pointers2 = assign({}, pointers);
      var ratios = [];
  
      forEach(pointers, function (pointer, pointerId) {
        delete pointers2[pointerId];
  
        forEach(pointers2, function (pointer2) {
          var x1 = Math.abs(pointer.startX - pointer2.startX);
          var y1 = Math.abs(pointer.startY - pointer2.startY);
          var x2 = Math.abs(pointer.endX - pointer2.endX);
          var y2 = Math.abs(pointer.endY - pointer2.endY);
          var z1 = Math.sqrt(x1 * x1 + y1 * y1);
          var z2 = Math.sqrt(x2 * x2 + y2 * y2);
          var ratio = (z2 - z1) / z1;
  
          ratios.push(ratio);
        });
      });
  
      ratios.sort(function (a, b) {
        return Math.abs(a) < Math.abs(b);
      });
  
      return ratios[0];
    }
  
    /**
     * Get a pointer from an event object.
     * @param {Object} event - The target event object.
     * @param {boolean} endOnly - Indicates if only returns the end point coordinate or not.
     * @returns {Object} The result pointer contains start and/or end point coordinates.
     */
    function getPointer(_ref2, endOnly) {
      var pageX = _ref2.pageX,
          pageY = _ref2.pageY;
  
      var end = {
        endX: pageX,
        endY: pageY
      };
  
      return endOnly ? end : assign({
        startX: pageX,
        startY: pageY
      }, end);
    }
  
    /**
     * Get the center point coordinate of a group of pointers.
     * @param {Object} pointers - The target pointers.
     * @returns {Object} The center point coordinate.
     */
    function getPointersCenter(pointers) {
      var pageX = 0;
      var pageY = 0;
      var count = 0;
  
      forEach(pointers, function (_ref3) {
        var startX = _ref3.startX,
            startY = _ref3.startY;
  
        pageX += startX;
        pageY += startY;
        count += 1;
      });
  
      pageX /= count;
      pageY /= count;
  
      return {
        pageX: pageX,
        pageY: pageY
      };
    }
  
    var render = {
      render: function render() {
        this.initContainer();
        this.initViewer();
        this.initList();
        this.renderViewer();
      },
      initContainer: function initContainer() {
        this.containerData = {
          width: window.innerWidth,
          height: window.innerHeight
        };
      },
      initViewer: function initViewer() {
        var options = this.options,
            parent = this.parent;
  
        var viewerData = void 0;
  
        if (options.inline) {
          viewerData = {
            width: Math.max(parent.offsetWidth, options.minWidth),
            height: Math.max(parent.offsetHeight, options.minHeight)
          };
  
          this.parentData = viewerData;
        }
  
        if (this.fulled || !viewerData) {
          viewerData = this.containerData;
        }
  
        this.viewerData = assign({}, viewerData);
      },
      renderViewer: function renderViewer() {
        if (this.options.inline && !this.fulled) {
          setStyle(this.viewer, this.viewerData);
        }
      },
      initList: function initList() {
        var _this = this;
  
        var element = this.element,
            options = this.options,
            list = this.list;
  
        var items = [];
  
        forEach(this.images, function (image, i) {
          var src = image.src;
  
          var alt = image.alt || getImageNameFromURL(src);
          var url = options.url;
  
  
          if (isString(url)) {
            url = image.getAttribute(url);
          } else if (isFunction(url)) {
            url = url.call(_this, image);
          }
  
          if (src || url) {
            items.push('<li>' + '<img' + (' src="' + (src || url) + '"') + ' role="button"' + ' data-action="view"' + (' data-index="' + i + '"') + (' data-original-url="' + (url || src) + '"') + (' alt="' + alt + '"') + '>' + '</li>');
          }
        });
  
        list.innerHTML = items.join('');
        this.items = list.getElementsByTagName('li');
        forEach(this.items, function (item) {
          var image = item.firstElementChild;
  
          setData(image, 'filled', true);
  
          if (options.loading) {
            addClass(item, CLASS_LOADING);
          }
  
          addListener(image, EVENT_LOAD, function (event) {
            if (options.loading) {
              removeClass(item, CLASS_LOADING);
            }
  
            _this.loadImage(event);
          }, {
            once: true
          });
        });
  
        if (options.transition) {
          addListener(element, EVENT_VIEWED, function () {
            addClass(list, CLASS_TRANSITION);
          }, {
            once: true
          });
        }
      },
      renderList: function renderList(index) {
        var i = index || this.index;
        var width = this.items[i].offsetWidth || 30;
        var outerWidth = width + 1; // 1 pixel of `margin-left` width
  
        // Place the active item in the center of the screen
        setStyle(this.list, assign({
          width: outerWidth * this.length
        }, getTransforms({
          translateX: (this.viewerData.width - width) / 2 - outerWidth * i
        })));
      },
      resetList: function resetList() {
        var list = this.list;
  
  
        list.innerHTML = '';
        removeClass(list, CLASS_TRANSITION);
        setStyle(list, getTransforms({
          translateX: 0
        }));
      },
      initImage: function initImage(done) {
        var _this2 = this;
  
        var options = this.options,
            image = this.image,
            viewerData = this.viewerData;
  
        var footerHeight = this.footer.offsetHeight;
        var viewerWidth = viewerData.width;
        var viewerHeight = Math.max(viewerData.height - footerHeight, footerHeight);
        var oldImageData = this.imageData || {};
        var sizingImage = void 0;
  
        this.imageInitializing = {
          abort: function abort() {
            sizingImage.onload = null;
          }
        };
  
        sizingImage = getImageNaturalSizes(image, function (naturalWidth, naturalHeight) {
          var aspectRatio = naturalWidth / naturalHeight;
          var width = viewerWidth;
          var height = viewerHeight;
  
          _this2.imageInitializing = false;
  
          if (viewerHeight * aspectRatio > viewerWidth) {
            height = viewerWidth / aspectRatio;
          } else {
            width = viewerHeight * aspectRatio;
          }
  
          width = Math.min(width * 0.9, naturalWidth);
          height = Math.min(height * 0.9, naturalHeight);
  
          var imageData = {
            naturalWidth: naturalWidth,
            naturalHeight: naturalHeight,
            aspectRatio: aspectRatio,
            ratio: width / naturalWidth,
            width: width,
            height: height,
            left: (viewerWidth - width) / 2,
            top: (viewerHeight - height) / 2
          };
          var initialImageData = assign({}, imageData);
  
          if (options.rotatable) {
            imageData.rotate = oldImageData.rotate || 0;
            initialImageData.rotate = 0;
          }
  
          if (options.scalable) {
            imageData.scaleX = oldImageData.scaleX || 1;
            imageData.scaleY = oldImageData.scaleY || 1;
            initialImageData.scaleX = 1;
            initialImageData.scaleY = 1;
          }
  
          _this2.imageData = imageData;
          _this2.initialImageData = initialImageData;
  
          if (done) {
            done();
          }
        });
      },
      renderImage: function renderImage(done) {
        var _this3 = this;
  
        var image = this.image,
            imageData = this.imageData;
  
  
        setStyle(image, assign({
          width: imageData.width,
          height: imageData.height,
          marginLeft: imageData.left,
          marginTop: imageData.top
        }, getTransforms(imageData)));
  
        if (done) {
          if (this.viewing && this.options.transition) {
            var onTransitionEnd = function onTransitionEnd() {
              _this3.imageRendering = false;
              done();
            };
  
            this.imageRendering = {
              abort: function abort() {
                removeListener(image, EVENT_TRANSITION_END, onTransitionEnd);
              }
            };
  
            addListener(image, EVENT_TRANSITION_END, onTransitionEnd, {
              once: true
            });
          } else {
            done();
          }
        }
      },
      resetImage: function resetImage() {
        // this.image only defined after viewed
        if (this.viewing || this.viewed) {
          var image = this.image;
  
  
          if (this.viewing) {
            this.viewing.abort();
          }
  
          image.parentNode.removeChild(image);
          this.image = null;
        }
      }
    };
  
    var events = {
      bind: function bind() {
        var element = this.element,
            viewer = this.viewer;
  
  
        addListener(viewer, EVENT_CLICK, this.onClick = this.click.bind(this));
        addListener(viewer, EVENT_WHEEL, this.onWheel = this.wheel.bind(this));
        addListener(viewer, EVENT_DRAG_START, this.onDragStart = this.dragstart.bind(this));
        addListener(this.canvas, EVENT_POINTER_DOWN, this.onPointerDown = this.pointerdown.bind(this));
        addListener(element.ownerDocument, EVENT_POINTER_MOVE, this.onPointerMove = this.pointermove.bind(this));
        addListener(element.ownerDocument, EVENT_POINTER_UP, this.onPointerUp = this.pointerup.bind(this));
        addListener(element.ownerDocument, EVENT_KEY_DOWN, this.onKeyDown = this.keydown.bind(this));
        addListener(window, EVENT_RESIZE, this.onResize = this.resize.bind(this));
      },
      unbind: function unbind() {
        var element = this.element,
            viewer = this.viewer;
  
  
        removeListener(viewer, EVENT_CLICK, this.onClick);
        removeListener(viewer, EVENT_WHEEL, this.onWheel);
        removeListener(viewer, EVENT_DRAG_START, this.onDragStart);
        removeListener(this.canvas, EVENT_POINTER_DOWN, this.onPointerDown);
        removeListener(element.ownerDocument, EVENT_POINTER_MOVE, this.onPointerMove);
        removeListener(element.ownerDocument, EVENT_POINTER_UP, this.onPointerUp);
        removeListener(element.ownerDocument, EVENT_KEY_DOWN, this.onKeyDown);
        removeListener(window, EVENT_RESIZE, this.onResize);
      }
    };
  
    var handlers = {
      click: function click(_ref) {
        var target = _ref.target;
        var options = this.options,
            imageData = this.imageData;
  
        var action = getData(target, 'action');
  
        switch (action) {
          case 'mix':
            if (this.played) {
              this.stop();
            } else if (options.inline) {
              if (this.fulled) {
                this.exit();
              } else {
                this.full();
              }
            } else {
              this.hide();
            }
  
            break;
  
          case 'hide':
            this.hide();
            break;
  
          case 'view':
            this.view(getData(target, 'index'));
            break;
  
          case 'zoom-in':
            this.zoom(0.1, true);
            break;
  
          case 'zoom-out':
            this.zoom(-0.1, true);
            break;
  
          case 'one-to-one':
            this.toggle();
            break;
  
          case 'reset':
            this.reset();
            break;
  
          case 'prev':
            this.prev(options.loop);
            break;
  
          case 'play':
            this.play(options.fullscreen);
            break;
  
          case 'next':
            this.next(options.loop);
            break;
  
          case 'rotate-left':
            this.rotate(-90);
            break;
  
          case 'rotate-right':
            this.rotate(90);
            break;
  
          case 'flip-horizontal':
            this.scaleX(-imageData.scaleX || -1);
            break;
  
          case 'flip-vertical':
            this.scaleY(-imageData.scaleY || -1);
            break;
  
          default:
            if (this.played) {
              this.stop();
            }
        }
      },
      load: function load() {
        var _this = this;
  
        if (this.timeout) {
          clearTimeout(this.timeout);
          this.timeout = false;
        }
  
        var element = this.element,
            options = this.options,
            image = this.image,
            index = this.index,
            viewerData = this.viewerData;
  
  
        removeClass(image, CLASS_INVISIBLE);
  
        if (options.loading) {
          removeClass(this.canvas, CLASS_LOADING);
        }
  
        image.style.cssText = 'height:0;' + ('margin-left:' + viewerData.width / 2 + 'px;') + ('margin-top:' + viewerData.height / 2 + 'px;') + 'max-width:none!important;' + 'position:absolute;' + 'width:0;';
  
        this.initImage(function () {
          toggleClass(image, CLASS_MOVE, options.movable);
          toggleClass(image, CLASS_TRANSITION, options.transition);
  
          _this.renderImage(function () {
            _this.viewed = true;
            _this.viewing = false;
  
            if (isFunction(options.viewed)) {
              addListener(element, EVENT_VIEWED, options.viewed, {
                once: true
              });
            }
  
            dispatchEvent(element, EVENT_VIEWED, {
              originalImage: _this.images[index],
              index: index,
              image: image
            });
          });
        });
      },
      loadImage: function loadImage(e) {
        var image = e.target;
        var parent = image.parentNode;
        var parentWidth = parent.offsetWidth || 30;
        var parentHeight = parent.offsetHeight || 50;
        var filled = !!getData(image, 'filled');
  
        getImageNaturalSizes(image, function (naturalWidth, naturalHeight) {
          var aspectRatio = naturalWidth / naturalHeight;
          var width = parentWidth;
          var height = parentHeight;
  
          if (parentHeight * aspectRatio > parentWidth) {
            if (filled) {
              width = parentHeight * aspectRatio;
            } else {
              height = parentWidth / aspectRatio;
            }
          } else if (filled) {
            height = parentWidth / aspectRatio;
          } else {
            width = parentHeight * aspectRatio;
          }
  
          setStyle(image, assign({
            width: width,
            height: height
          }, getTransforms({
            translateX: (parentWidth - width) / 2,
            translateY: (parentHeight - height) / 2
          })));
        });
      },
      keydown: function keydown(e) {
        var options = this.options;
  
  
        if (!this.fulled || !options.keyboard) {
          return;
        }
  
        switch (e.keyCode || e.which || e.charCode) {
          // Escape
          case 27:
            if (this.played) {
              this.stop();
            } else if (options.inline) {
              if (this.fulled) {
                this.exit();
              }
            } else {
              this.hide();
            }
  
            break;
  
          // Space
          case 32:
            if (this.played) {
              this.stop();
            }
  
            break;
  
          // ArrowLeft
          case 37:
            this.prev(options.loop);
            break;
  
          // ArrowUp
          case 38:
            // Prevent scroll on Firefox
            e.preventDefault();
  
            // Zoom in
            this.zoom(options.zoomRatio, true);
            break;
  
          // ArrowRight
          case 39:
            this.next(options.loop);
            break;
  
          // ArrowDown
          case 40:
            // Prevent scroll on Firefox
            e.preventDefault();
  
            // Zoom out
            this.zoom(-options.zoomRatio, true);
            break;
  
          // Ctrl + 0
          case 48:
          // Fall through
  
          // Ctrl + 1
          // eslint-disable-next-line no-fallthrough
          case 49:
            if (e.ctrlKey) {
              e.preventDefault();
              this.toggle();
            }
  
            break;
  
          default:
        }
      },
      dragstart: function dragstart(e) {
        if (e.target.tagName.toLowerCase() === 'img') {
          e.preventDefault();
        }
      },
      pointerdown: function pointerdown(e) {
        var options = this.options,
            pointers = this.pointers;
  
  
        if (!this.viewed || this.showing || this.viewing || this.hiding) {
          return;
        }
  
        if (e.changedTouches) {
          forEach(e.changedTouches, function (touch) {
            pointers[touch.identifier] = getPointer(touch);
          });
        } else {
          pointers[e.pointerId || 0] = getPointer(e);
        }
  
        var action = options.movable ? ACTION_MOVE : false;
  
        if (Object.keys(pointers).length > 1) {
          action = ACTION_ZOOM;
        } else if ((e.pointerType === 'touch' || e.type === 'touchstart') && this.isSwitchable()) {
          action = ACTION_SWITCH;
        }
  
        this.action = action;
      },
      pointermove: function pointermove(e) {
        var options = this.options,
            pointers = this.pointers,
            action = this.action,
            image = this.image;
  
  
        if (!this.viewed || !action) {
          return;
        }
  
        e.preventDefault();
  
        if (e.changedTouches) {
          forEach(e.changedTouches, function (touch) {
            assign(pointers[touch.identifier], getPointer(touch, true));
          });
        } else {
          assign(pointers[e.pointerId || 0], getPointer(e, true));
        }
  
        if (action === ACTION_MOVE && options.transition && hasClass(image, CLASS_TRANSITION)) {
          removeClass(image, CLASS_TRANSITION);
        }
  
        this.change(e);
      },
      pointerup: function pointerup(e) {
        var action = this.action,
            pointers = this.pointers;
  
  
        if (e.changedTouches) {
          forEach(e.changedTouches, function (touch) {
            delete pointers[touch.identifier];
          });
        } else {
          delete pointers[e.pointerId || 0];
        }
  
        if (!action) {
          return;
        }
  
        if (action === ACTION_MOVE && this.options.transition) {
          addClass(this.image, CLASS_TRANSITION);
        }
  
        this.action = false;
      },
      resize: function resize() {
        var _this2 = this;
  
        if (!this.isShown || this.hiding) {
          return;
        }
  
        this.initContainer();
        this.initViewer();
        this.renderViewer();
        this.renderList();
  
        if (this.viewed) {
          this.initImage(function () {
            _this2.renderImage();
          });
        }
  
        if (this.played) {
          if (this.options.fullscreen && this.fulled && !document.fullscreenElement && !document.mozFullScreenElement && !document.webkitFullscreenElement && !document.msFullscreenElement) {
            this.stop();
            return;
          }
  
          forEach(this.player.getElementsByTagName('img'), function (image) {
            addListener(image, EVENT_LOAD, _this2.loadImage.bind(_this2), {
              once: true
            });
            dispatchEvent(image, EVENT_LOAD);
          });
        }
      },
      wheel: function wheel(e) {
        var _this3 = this;
  
        if (!this.viewed) {
          return;
        }
  
        e.preventDefault();
  
        // Limit wheel speed to prevent zoom too fast
        if (this.wheeling) {
          return;
        }
  
        this.wheeling = true;
  
        setTimeout(function () {
          _this3.wheeling = false;
        }, 50);
  
        var ratio = Number(this.options.zoomRatio) || 0.1;
        var delta = 1;
  
        if (e.deltaY) {
          delta = e.deltaY > 0 ? 1 : -1;
        } else if (e.wheelDelta) {
          delta = -e.wheelDelta / 120;
        } else if (e.detail) {
          delta = e.detail > 0 ? 1 : -1;
        }
  
        this.zoom(-delta * ratio, true, e);
      }
    };
  
    var methods = {
      /** Show the viewer (only available in modal mode)
       * @param {boolean} [immediate=false] - Indicates if show the viewer immediately or not.
       * @returns {Viewer} this
       */
      show: function show() {
        var immediate = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;
        var element = this.element,
            options = this.options;
  
  
        if (options.inline || this.showing || this.isShown || this.showing) {
          return this;
        }
  
        if (!this.ready) {
          this.build();
  
          if (this.ready) {
            this.show(immediate);
          }
  
          return this;
        }
  
        if (isFunction(options.show)) {
          addListener(element, EVENT_SHOW, options.show, {
            once: true
          });
        }
  
        if (dispatchEvent(element, EVENT_SHOW) === false || !this.ready) {
          return this;
        }
  
        if (this.hiding) {
          this.transitioning.abort();
        }
  
        this.showing = true;
        this.open();
  
        var viewer = this.viewer;
  
  
        removeClass(viewer, CLASS_HIDE);
  
        if (options.transition && !immediate) {
          var shown = this.shown.bind(this);
  
          this.transitioning = {
            abort: function abort() {
              removeListener(viewer, EVENT_TRANSITION_END, shown);
              removeClass(viewer, CLASS_IN);
            }
          };
  
          addClass(viewer, CLASS_TRANSITION);
  
          // Force reflow to enable CSS3 transition
          // eslint-disable-next-line
          viewer.offsetWidth;
          addListener(viewer, EVENT_TRANSITION_END, shown, {
            once: true
          });
          addClass(viewer, CLASS_IN);
        } else {
          addClass(viewer, CLASS_IN);
          this.shown();
        }
  
        return this;
      },
  
  
      /**
       * Hide the viewer (only available in modal mode)
       * @param {boolean} [immediate=false] - Indicates if hide the viewer immediately or not.
       * @returns {Viewer} this
       */
      hide: function hide() {
        var immediate = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;
        var element = this.element,
            options = this.options;
  
  
        if (options.inline || this.hiding || !(this.isShown || this.showing)) {
          return this;
        }
  
        if (isFunction(options.hide)) {
          addListener(element, EVENT_HIDE, options.hide, {
            once: true
          });
        }
  
        if (dispatchEvent(element, EVENT_HIDE) === false) {
          return this;
        }
  
        if (this.showing) {
          this.transitioning.abort();
        }
  
        this.hiding = true;
  
        if (this.played) {
          this.stop();
        } else if (this.viewing) {
          this.viewing.abort();
        }
  
        var viewer = this.viewer;
  
  
        if (options.transition && !immediate) {
          var hidden = this.hidden.bind(this);
          var hide = function hide() {
            addListener(viewer, EVENT_TRANSITION_END, hidden, {
              once: true
            });
            removeClass(viewer, CLASS_IN);
          };
  
          this.transitioning = {
            abort: function abort() {
              if (this.viewed) {
                removeListener(this.image, EVENT_TRANSITION_END, hide);
              } else {
                removeListener(viewer, EVENT_TRANSITION_END, hidden);
              }
            }
          };
  
          if (this.viewed) {
            addListener(this.image, EVENT_TRANSITION_END, hide, {
              once: true
            });
            this.zoomTo(0, false, false, true);
          } else {
            hide();
          }
        } else {
          removeClass(viewer, CLASS_IN);
          this.hidden();
        }
  
        return this;
      },
  
  
      /**
       * View one of the images with image's index
       * @param {number} index - The index of the image to view.
       * @returns {Viewer} this
       */
      view: function view() {
        var _this = this;
  
        var index = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 0;
  
        index = Number(index) || 0;
  
        if (!this.isShown) {
          this.index = index;
          return this.show();
        }
  
        if (this.hiding || this.played || index < 0 || index >= this.length || this.viewed && index === this.index) {
          return this;
        }
  
        if (this.viewing) {
          this.viewing.abort();
        }
  
        var element = this.element,
            options = this.options,
            title = this.title,
            canvas = this.canvas;
  
        var item = this.items[index];
        var img = item.querySelector('img');
        var url = getData(img, 'originalUrl');
        var alt = img.getAttribute('alt');
        var image = document.createElement('img');
  
        image.src = url;
        image.alt = alt;
  
        if (isFunction(options.view)) {
          addListener(element, EVENT_VIEW, options.view, {
            once: true
          });
        }
  
        if (dispatchEvent(element, EVENT_VIEW, {
          originalImage: this.images[index],
          index: index,
          image: image
        }) === false || !this.isShown || this.hiding || this.played) {
          return this;
        }
  
        this.image = image;
        removeClass(this.items[this.index], CLASS_ACTIVE);
        addClass(item, CLASS_ACTIVE);
        this.viewed = false;
        this.index = index;
        this.imageData = {};
        addClass(image, CLASS_INVISIBLE);
  
        if (options.loading) {
          addClass(canvas, CLASS_LOADING);
        }
  
        canvas.innerHTML = '';
        canvas.appendChild(image);
  
        // Center current item
        this.renderList();
  
        // Clear title
        title.innerHTML = '';
  
        // Generate title after viewed
        var onViewed = function onViewed() {
          var imageData = _this.imageData;
  
  
          title.textContent = alt + ' (' + imageData.naturalWidth + ' \xD7 ' + imageData.naturalHeight + ')';
        };
        var onLoad = void 0;
  
        addListener(element, EVENT_VIEWED, onViewed, {
          once: true
        });
  
        this.viewing = {
          abort: function abort() {
            removeListener(element, EVENT_VIEWED, onViewed);
  
            if (image.complete) {
              if (this.imageRendering) {
                this.imageRendering.abort();
              } else if (this.imageInitializing) {
                this.imageInitializing.abort();
              }
            } else {
              removeListener(image, EVENT_LOAD, onLoad);
  
              if (this.timeout) {
                clearTimeout(this.timeout);
              }
            }
          }
        };
  
        if (image.complete) {
          this.load();
        } else {
          addListener(image, EVENT_LOAD, onLoad = this.load.bind(this), {
            once: true
          });
  
          if (this.timeout) {
            clearTimeout(this.timeout);
          }
  
          // Make the image visible if it fails to load within 1s
          this.timeout = setTimeout(function () {
            removeClass(image, CLASS_INVISIBLE);
            _this.timeout = false;
          }, 1000);
        }
  
        return this;
      },
  
  
      /**
       * View the previous image
       * @param {boolean} [loop=false] - Indicate if view the last one
       * when it is the first one at present.
       * @returns {Viewer} this
       */
      prev: function prev() {
        var loop = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;
  
        var index = this.index - 1;
  
        if (index < 0) {
          index = loop ? this.length - 1 : 0;
        }
  
        this.view(index);
        return this;
      },
  
  
      /**
       * View the next image
       * @param {boolean} [loop=false] - Indicate if view the first one
       * when it is the last one at present.
       * @returns {Viewer} this
       */
      next: function next() {
        var loop = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;
  
        var maxIndex = this.length - 1;
        var index = this.index + 1;
  
        if (index > maxIndex) {
          index = loop ? 0 : maxIndex;
        }
  
        this.view(index);
        return this;
      },
  
  
      /**
       * Move the image with relative offsets.
       * @param {number} offsetX - The relative offset distance on the x-axis.
       * @param {number} offsetY - The relative offset distance on the y-axis.
       * @returns {Viewer} this
       */
      move: function move(offsetX, offsetY) {
        var imageData = this.imageData;
  
  
        this.moveTo(isUndefined(offsetX) ? offsetX : imageData.left + Number(offsetX), isUndefined(offsetY) ? offsetY : imageData.top + Number(offsetY));
  
        return this;
      },
  
  
      /**
       * Move the image to an absolute point.
       * @param {number} x - The x-axis coordinate.
       * @param {number} [y=x] - The y-axis coordinate.
       * @returns {Viewer} this
       */
      moveTo: function moveTo(x) {
        var y = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : x;
        var imageData = this.imageData;
  
  
        x = Number(x);
        y = Number(y);
  
        if (this.viewed && !this.played && this.options.movable) {
          var changed = false;
  
          if (isNumber(x)) {
            imageData.left = x;
            changed = true;
          }
  
          if (isNumber(y)) {
            imageData.top = y;
            changed = true;
          }
  
          if (changed) {
            this.renderImage();
          }
        }
  
        return this;
      },
  
  
      /**
       * Zoom the image with a relative ratio.
       * @param {number} ratio - The target ratio.
       * @param {boolean} [hasTooltip=false] - Indicates if it has a tooltip or not.
       * @param {Event} [_originalEvent=null] - The original event if any.
       * @returns {Viewer} this
       */
      zoom: function zoom(ratio) {
        var hasTooltip = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
  
        var _originalEvent = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : null;
  
        var imageData = this.imageData;
  
  
        ratio = Number(ratio);
  
        if (ratio < 0) {
          ratio = 1 / (1 - ratio);
        } else {
          ratio = 1 + ratio;
        }
  
        this.zoomTo(imageData.width * ratio / imageData.naturalWidth, hasTooltip, _originalEvent);
  
        return this;
      },
  
  
      /**
       * Zoom the image to an absolute ratio.
       * @param {number} ratio - The target ratio.
       * @param {boolean} [hasTooltip=false] - Indicates if it has a tooltip or not.
       * @param {Event} [_originalEvent=null] - The original event if any.
       * @param {Event} [_zoomable=false] - Indicates if the current zoom is available or not.
       * @returns {Viewer} this
       */
      zoomTo: function zoomTo(ratio) {
        var hasTooltip = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
  
        var _originalEvent = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : null;
  
        var _zoomable = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : false;
  
        var options = this.options,
            pointers = this.pointers,
            imageData = this.imageData;
  
  
        ratio = Math.max(0, ratio);
  
        if (isNumber(ratio) && this.viewed && !this.played && (_zoomable || options.zoomable)) {
          if (!_zoomable) {
            var minZoomRatio = Math.max(0.01, options.minZoomRatio);
            var maxZoomRatio = Math.min(100, options.maxZoomRatio);
  
            ratio = Math.min(Math.max(ratio, minZoomRatio), maxZoomRatio);
          }
  
          if (_originalEvent && ratio > 0.95 && ratio < 1.05) {
            ratio = 1;
          }
  
          var newWidth = imageData.naturalWidth * ratio;
          var newHeight = imageData.naturalHeight * ratio;
  
          if (_originalEvent) {
            var offset = getOffset(this.viewer);
            var center = pointers && Object.keys(pointers).length ? getPointersCenter(pointers) : {
              pageX: _originalEvent.pageX,
              pageY: _originalEvent.pageY
            };
  
            // Zoom from the triggering point of the event
            imageData.left -= (newWidth - imageData.width) * ((center.pageX - offset.left - imageData.left) / imageData.width);
            imageData.top -= (newHeight - imageData.height) * ((center.pageY - offset.top - imageData.top) / imageData.height);
          } else {
            // Zoom from the center of the image
            imageData.left -= (newWidth - imageData.width) / 2;
            imageData.top -= (newHeight - imageData.height) / 2;
          }
  
          imageData.width = newWidth;
          imageData.height = newHeight;
          imageData.ratio = ratio;
          this.renderImage();
  
          if (hasTooltip) {
            this.tooltip();
          }
        }
  
        return this;
      },
  
  
      /**
       * Rotate the image with a relative degree.
       * @param {number} degree - The rotate degree.
       * @returns {Viewer} this
       */
      rotate: function rotate(degree) {
        this.rotateTo((this.imageData.rotate || 0) + Number(degree));
  
        return this;
      },
  
  
      /**
       * Rotate the image to an absolute degree.
       * @param {number} degree - The rotate degree.
       * @returns {Viewer} this
       */
      rotateTo: function rotateTo(degree) {
        var imageData = this.imageData;
  
  
        degree = Number(degree);
  
        if (isNumber(degree) && this.viewed && !this.played && this.options.rotatable) {
          imageData.rotate = degree;
          this.renderImage();
        }
  
        return this;
      },
  
  
      /**
       * Scale the image on the x-axis.
       * @param {number} scaleX - The scale ratio on the x-axis.
       * @returns {Viewer} this
       */
      scaleX: function scaleX(_scaleX) {
        this.scale(_scaleX, this.imageData.scaleY);
  
        return this;
      },
  
  
      /**
       * Scale the image on the y-axis.
       * @param {number} scaleY - The scale ratio on the y-axis.
       * @returns {Viewer} this
       */
      scaleY: function scaleY(_scaleY) {
        this.scale(this.imageData.scaleX, _scaleY);
  
        return this;
      },
  
  
      /**
       * Scale the image.
       * @param {number} scaleX - The scale ratio on the x-axis.
       * @param {number} [scaleY=scaleX] - The scale ratio on the y-axis.
       * @returns {Viewer} this
       */
      scale: function scale(scaleX) {
        var scaleY = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : scaleX;
        var imageData = this.imageData;
  
  
        scaleX = Number(scaleX);
        scaleY = Number(scaleY);
  
        if (this.viewed && !this.played && this.options.scalable) {
          var changed = false;
  
          if (isNumber(scaleX)) {
            imageData.scaleX = scaleX;
            changed = true;
          }
  
          if (isNumber(scaleY)) {
            imageData.scaleY = scaleY;
            changed = true;
          }
  
          if (changed) {
            this.renderImage();
          }
        }
  
        return this;
      },
  
  
      /**
       * Play the images
       * @param {boolean} [fullscreen=false] - Indicate if request fullscreen or not.
       * @returns {Viewer} this
       */
      play: function play() {
        var _this2 = this;
  
        var fullscreen = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : false;
  
        if (!this.isShown || this.played) {
          return this;
        }
  
        var options = this.options,
            player = this.player;
  
        var onLoad = this.loadImage.bind(this);
        var list = [];
        var total = 0;
        var index = 0;
  
        this.played = true;
        this.onLoadWhenPlay = onLoad;
  
        if (fullscreen) {
          this.requestFullscreen();
        }
  
        addClass(player, CLASS_SHOW);
        forEach(this.items, function (item, i) {
          var img = item.querySelector('img');
          var image = document.createElement('img');
  
          image.src = getData(img, 'originalUrl');
          image.alt = img.getAttribute('alt');
          total += 1;
          addClass(image, CLASS_FADE);
          toggleClass(image, CLASS_TRANSITION, options.transition);
  
          if (hasClass(item, CLASS_ACTIVE)) {
            addClass(image, CLASS_IN);
            index = i;
          }
  
          list.push(image);
          addListener(image, EVENT_LOAD, onLoad, {
            once: true
          });
          player.appendChild(image);
        });
  
        if (isNumber(options.interval) && options.interval > 0) {
          var play = function play() {
            _this2.playing = setTimeout(function () {
              removeClass(list[index], CLASS_IN);
              index += 1;
              index = index < total ? index : 0;
              addClass(list[index], CLASS_IN);
              play();
            }, options.interval);
          };
  
          if (total > 1) {
            play();
          }
        }
  
        return this;
      },
  
  
      // Stop play
      stop: function stop() {
        var _this3 = this;
  
        if (!this.played) {
          return this;
        }
  
        var player = this.player;
  
  
        this.played = false;
        clearTimeout(this.playing);
        forEach(player.getElementsByTagName('img'), function (image) {
          removeListener(image, EVENT_LOAD, _this3.onLoadWhenPlay);
        });
        removeClass(player, CLASS_SHOW);
        player.innerHTML = '';
        this.exitFullscreen();
  
        return this;
      },
  
  
      // Enter modal mode (only available in inline mode)
      full: function full() {
        var _this4 = this;
  
        var options = this.options,
            viewer = this.viewer,
            image = this.image,
            list = this.list;
  
  
        if (!this.isShown || this.played || this.fulled || !options.inline) {
          return this;
        }
  
        this.fulled = true;
        this.open();
        addClass(this.button, CLASS_FULLSCREEN_EXIT);
  
        if (options.transition) {
          removeClass(list, CLASS_TRANSITION);
  
          if (this.viewed) {
            removeClass(image, CLASS_TRANSITION);
          }
        }
  
        addClass(viewer, CLASS_FIXED);
        viewer.setAttribute('style', '');
        setStyle(viewer, {
          zIndex: options.zIndex
        });
  
        this.initContainer();
        this.viewerData = assign({}, this.containerData);
        this.renderList();
  
        if (this.viewed) {
          this.initImage(function () {
            _this4.renderImage(function () {
              if (options.transition) {
                setTimeout(function () {
                  addClass(image, CLASS_TRANSITION);
                  addClass(list, CLASS_TRANSITION);
                }, 0);
              }
            });
          });
        }
  
        return this;
      },
  
  
      // Exit modal mode (only available in inline mode)
      exit: function exit() {
        var _this5 = this;
  
        var options = this.options,
            viewer = this.viewer,
            image = this.image,
            list = this.list;
  
  
        if (!this.isShown || this.played || !this.fulled || !options.inline) {
          return this;
        }
  
        this.fulled = false;
        this.close();
        removeClass(this.button, CLASS_FULLSCREEN_EXIT);
  
        if (options.transition) {
          removeClass(list, CLASS_TRANSITION);
  
          if (this.viewed) {
            removeClass(image, CLASS_TRANSITION);
          }
        }
  
        removeClass(viewer, CLASS_FIXED);
        setStyle(viewer, {
          zIndex: options.zIndexInline
        });
  
        this.viewerData = assign({}, this.parentData);
        this.renderViewer();
        this.renderList();
  
        if (this.viewed) {
          this.initImage(function () {
            _this5.renderImage(function () {
              if (options.transition) {
                setTimeout(function () {
                  addClass(image, CLASS_TRANSITION);
                  addClass(list, CLASS_TRANSITION);
                }, 0);
              }
            });
          });
        }
  
        return this;
      },
  
  
      // Show the current ratio of the image with percentage
      tooltip: function tooltip() {
        var _this6 = this;
  
        var options = this.options,
            tooltipBox = this.tooltipBox,
            imageData = this.imageData;
  
  
        if (!this.viewed || this.played || !options.tooltip) {
          return this;
        }
  
        tooltipBox.textContent = Math.round(imageData.ratio * 100) + '%';
  
        if (!this.tooltipping) {
          if (options.transition) {
            if (this.fading) {
              dispatchEvent(tooltipBox, EVENT_TRANSITION_END);
            }
  
            addClass(tooltipBox, CLASS_SHOW);
            addClass(tooltipBox, CLASS_FADE);
            addClass(tooltipBox, CLASS_TRANSITION);
  
            // Force reflow to enable CSS3 transition
            // eslint-disable-next-line
            tooltipBox.offsetWidth;
            addClass(tooltipBox, CLASS_IN);
          } else {
            addClass(tooltipBox, CLASS_SHOW);
          }
        } else {
          clearTimeout(this.tooltipping);
        }
  
        this.tooltipping = setTimeout(function () {
          if (options.transition) {
            addListener(tooltipBox, EVENT_TRANSITION_END, function () {
              removeClass(tooltipBox, CLASS_SHOW);
              removeClass(tooltipBox, CLASS_FADE);
              removeClass(tooltipBox, CLASS_TRANSITION);
              _this6.fading = false;
            }, {
              once: true
            });
  
            removeClass(tooltipBox, CLASS_IN);
            _this6.fading = true;
          } else {
            removeClass(tooltipBox, CLASS_SHOW);
          }
  
          _this6.tooltipping = false;
        }, 1000);
  
        return this;
      },
  
  
      // Toggle the image size between its natural size and initial size
      toggle: function toggle() {
        if (this.imageData.ratio === 1) {
          this.zoomTo(this.initialImageData.ratio, true);
        } else {
          this.zoomTo(1, true);
        }
  
        return this;
      },
  
  
      // Reset the image to its initial state
      reset: function reset() {
        if (this.viewed && !this.played) {
          this.imageData = assign({}, this.initialImageData);
          this.renderImage();
        }
  
        return this;
      },
  
  
      // Update viewer when images changed
      update: function update() {
        var element = this.element,
            options = this.options,
            isImg = this.isImg;
  
        // Destroy viewer if the target image was deleted
  
        if (isImg && !element.parentNode) {
          return this.destroy();
        }
  
        var images = [];
  
        forEach(isImg ? [element] : element.querySelectorAll('img'), function (image) {
          if (options.filter) {
            if (options.filter(image)) {
              images.push(image);
            }
          } else {
            images.push(image);
          }
        });
  
        if (!images.length) {
          return this;
        }
  
        this.images = images;
        this.length = images.length;
  
        if (this.ready) {
          var indexes = [];
  
          forEach(this.items, function (item, i) {
            var img = item.querySelector('img');
            var image = images[i];
  
            if (image) {
              if (image.src !== img.src) {
                indexes.push(i);
              }
            } else {
              indexes.push(i);
            }
          });
  
          setStyle(this.list, {
            width: 'auto'
          });
  
          this.initList();
  
          if (this.isShown) {
            if (this.length) {
              if (this.viewed) {
                var index = indexes.indexOf(this.index);
  
                if (index >= 0) {
                  this.viewed = false;
                  this.view(Math.max(this.index - (index + 1), 0));
                } else {
                  addClass(this.items[this.index], CLASS_ACTIVE);
                }
              }
            } else {
              this.image = null;
              this.viewed = false;
              this.index = 0;
              this.imageData = null;
              this.canvas.innerHTML = '';
              this.title.innerHTML = '';
            }
          }
        } else {
          this.build();
        }
  
        return this;
      },
  
  
      // Destroy the viewer
      destroy: function destroy() {
        var element = this.element,
            options = this.options;
  
  
        if (!getData(element, NAMESPACE)) {
          return this;
        }
  
        this.destroyed = true;
  
        if (this.ready) {
          if (this.played) {
            this.stop();
          }
  
          if (options.inline) {
            if (this.fulled) {
              this.exit();
            }
  
            this.unbind();
          } else if (this.isShown) {
            if (this.viewing) {
              if (this.imageRendering) {
                this.imageRendering.abort();
              } else if (this.imageInitializing) {
                this.imageInitializing.abort();
              }
            }
  
            if (this.hiding) {
              this.transitioning.abort();
            }
  
            this.hidden();
          } else if (this.showing) {
            this.transitioning.abort();
            this.hidden();
          }
  
          this.ready = false;
          this.viewer.parentNode.removeChild(this.viewer);
        } else if (options.inline) {
          if (this.delaying) {
            this.delaying.abort();
          } else if (this.initializing) {
            this.initializing.abort();
          }
        }
  
        if (!options.inline) {
          removeListener(element, EVENT_CLICK, this.onStart);
        }
  
        removeData(element, NAMESPACE);
        return this;
      }
    };
  
    var others = {
      open: function open() {
        var body = this.body;
  
  
        addClass(body, CLASS_OPEN);
  
        body.style.paddingRight = this.scrollbarWidth + (parseFloat(this.initialBodyPaddingRight) || 0) + 'px';
      },
      close: function close() {
        var body = this.body;
  
  
        removeClass(body, CLASS_OPEN);
        body.style.paddingRight = this.initialBodyPaddingRight;
      },
      shown: function shown() {
        var element = this.element,
            options = this.options;
  
  
        this.fulled = true;
        this.isShown = true;
        this.render();
        this.bind();
        this.showing = false;
  
        if (isFunction(options.shown)) {
          addListener(element, EVENT_SHOWN, options.shown, {
            once: true
          });
        }
  
        if (dispatchEvent(element, EVENT_SHOWN) === false) {
          return;
        }
  
        if (this.ready && this.isShown && !this.hiding) {
          this.view(this.index);
        }
      },
      hidden: function hidden() {
        var element = this.element,
            options = this.options;
  
  
        this.fulled = false;
        this.viewed = false;
        this.isShown = false;
        this.close();
        this.unbind();
        addClass(this.viewer, CLASS_HIDE);
        this.resetList();
        this.resetImage();
        this.hiding = false;
  
        if (!this.destroyed) {
          if (isFunction(options.hidden)) {
            addListener(element, EVENT_HIDDEN, options.hidden, {
              once: true
            });
          }
  
          dispatchEvent(element, EVENT_HIDDEN);
        }
      },
      requestFullscreen: function requestFullscreen() {
        var document = this.element.ownerDocument;
  
        if (this.fulled && !document.fullscreenElement && !document.mozFullScreenElement && !document.webkitFullscreenElement && !document.msFullscreenElement) {
          var documentElement = document.documentElement;
  
  
          if (documentElement.requestFullscreen) {
            documentElement.requestFullscreen();
          } else if (documentElement.msRequestFullscreen) {
            documentElement.msRequestFullscreen();
          } else if (documentElement.mozRequestFullScreen) {
            documentElement.mozRequestFullScreen();
          } else if (documentElement.webkitRequestFullscreen) {
            documentElement.webkitRequestFullscreen(Element.ALLOW_KEYBOARD_INPUT);
          }
        }
      },
      exitFullscreen: function exitFullscreen() {
        if (this.fulled) {
          var document = this.element.ownerDocument;
  
          if (document.exitFullscreen) {
            document.exitFullscreen();
          } else if (document.msExitFullscreen) {
            document.msExitFullscreen();
          } else if (document.mozCancelFullScreen) {
            document.mozCancelFullScreen();
          } else if (document.webkitExitFullscreen) {
            document.webkitExitFullscreen();
          }
        }
      },
      change: function change(e) {
        var options = this.options,
            pointers = this.pointers;
  
        var pointer = pointers[Object.keys(pointers)[0]];
        var offsetX = pointer.endX - pointer.startX;
        var offsetY = pointer.endY - pointer.startY;
  
        switch (this.action) {
          // Move the current image
          case ACTION_MOVE:
            this.move(offsetX, offsetY);
            break;
  
          // Zoom the current image
          case ACTION_ZOOM:
            this.zoom(getMaxZoomRatio(pointers), false, e);
            break;
  
          case ACTION_SWITCH:
            this.action = 'switched';
  
            // Empty `pointers` as `touchend` event will not be fired after swiped in iOS browsers.
            this.pointers = {};
  
            if (Math.abs(offsetX) > Math.abs(offsetY)) {
              if (offsetX > 1) {
                this.prev(options.loop);
              } else if (offsetX < -1) {
                this.next(options.loop);
              }
            }
  
            break;
  
          default:
        }
  
        // Override
        forEach(pointers, function (p) {
          p.startX = p.endX;
          p.startY = p.endY;
        });
      },
      isSwitchable: function isSwitchable() {
        var imageData = this.imageData,
            viewerData = this.viewerData;
  
  
        return this.length > 1 && imageData.left >= 0 && imageData.top >= 0 && imageData.width <= viewerData.width && imageData.height <= viewerData.height;
      }
    };
  
    var AnotherViewer = WINDOW.Viewer;
  
    var Viewer = function () {
      /**
       * Create a new Viewer.
       * @param {Element} element - The target element for viewing.
       * @param {Object} [options={}] - The configuration options.
       */
      function Viewer(element) {
        var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
        classCallCheck(this, Viewer);
  
        if (!element || element.nodeType !== 1) {
          throw new Error('The first argument is required and must be an element.');
        }
  
        this.element = element;
        this.options = assign({}, DEFAULTS, isPlainObject(options) && options);
        this.action = false;
        this.fading = false;
        this.fulled = false;
        this.hiding = false;
        this.index = 0;
        this.isImg = false;
        this.length = 0;
        this.played = false;
        this.playing = false;
        this.pointers = {};
        this.ready = false;
        this.showing = false;
        this.timeout = false;
        this.tooltipping = false;
        this.viewed = false;
        this.viewing = false;
        this.isShown = false;
        this.wheeling = false;
        this.init();
      }
  
      createClass(Viewer, [{
        key: 'init',
        value: function init() {
          var _this = this;
  
          var element = this.element,
              options = this.options;
  
  
          if (getData(element, NAMESPACE)) {
            return;
          }
  
          setData(element, NAMESPACE, this);
  
          var isImg = element.tagName.toLowerCase() === 'img';
          var images = [];
  
          forEach(isImg ? [element] : element.querySelectorAll('img'), function (image) {
            if (isFunction(options.filter)) {
              if (options.filter.call(_this, image)) {
                images.push(image);
              }
            } else {
              images.push(image);
            }
          });
  
          if (!images.length) {
            return;
          }
  
          this.isImg = isImg;
          this.length = images.length;
          this.images = images;
  
          var ownerDocument = element.ownerDocument;
  
          var body = ownerDocument.body || ownerDocument.documentElement;
  
          this.body = body;
          this.scrollbarWidth = window.innerWidth - ownerDocument.documentElement.clientWidth;
          this.initialBodyPaddingRight = window.getComputedStyle(body).paddingRight;
  
          // Override `transition` option if it is not supported
          if (isUndefined(document.createElement(NAMESPACE).style.transition)) {
            options.transition = false;
          }
  
          if (options.inline) {
            var count = 0;
            var progress = function progress() {
              count += 1;
  
              if (count === _this.length) {
                var timeout = void 0;
  
                _this.initializing = false;
                _this.delaying = {
                  abort: function abort() {
                    clearTimeout(timeout);
                  }
                };
  
                // build asynchronously to keep `this.viewer` is accessible in `ready` event handler.
                timeout = setTimeout(function () {
                  _this.delaying = false;
                  _this.build();
                }, 0);
              }
            };
  
            this.initializing = {
              abort: function abort() {
                forEach(images, function (image) {
                  if (!image.complete) {
                    removeListener(image, EVENT_LOAD, progress);
                  }
                });
              }
            };
  
            forEach(images, function (image) {
              if (image.complete) {
                progress();
              } else {
                addListener(image, EVENT_LOAD, progress, {
                  once: true
                });
              }
            });
          } else {
            addListener(element, EVENT_CLICK, this.onStart = function (_ref) {
              var target = _ref.target;
  
              if (target.tagName.toLowerCase() === 'img') {
                _this.view(_this.images.indexOf(target));
              }
            });
          }
        }
      }, {
        key: 'build',
        value: function build() {
          if (this.ready) {
            return;
          }
  
          var element = this.element,
              options = this.options;
  
          var parent = element.parentNode;
          var template = document.createElement('div');
  
          template.innerHTML = TEMPLATE;
  
          var viewer = template.querySelector('.' + NAMESPACE + '-container');
          var title = viewer.querySelector('.' + NAMESPACE + '-title');
          var toolbar = viewer.querySelector('.' + NAMESPACE + '-toolbar');
          var navbar = viewer.querySelector('.' + NAMESPACE + '-navbar');
          var button = viewer.querySelector('.' + NAMESPACE + '-button');
          var canvas = viewer.querySelector('.' + NAMESPACE + '-canvas');
  
          this.parent = parent;
          this.viewer = viewer;
          this.title = title;
          this.toolbar = toolbar;
          this.navbar = navbar;
          this.button = button;
          this.canvas = canvas;
          this.footer = viewer.querySelector('.' + NAMESPACE + '-footer');
          this.tooltipBox = viewer.querySelector('.' + NAMESPACE + '-tooltip');
          this.player = viewer.querySelector('.' + NAMESPACE + '-player');
          this.list = viewer.querySelector('.' + NAMESPACE + '-list');
  
          addClass(title, !options.title ? CLASS_HIDE : getResponsiveClass(options.title));
          addClass(navbar, !options.navbar ? CLASS_HIDE : getResponsiveClass(options.navbar));
          toggleClass(button, CLASS_HIDE, !options.button);
  
          if (options.backdrop) {
            addClass(viewer, NAMESPACE + '-backdrop');
  
            if (!options.inline && options.backdrop === true) {
              setData(canvas, 'action', 'hide');
            }
          }
  
          if (options.toolbar) {
            var list = document.createElement('ul');
            var custom = isPlainObject(options.toolbar);
            var zoomButtons = BUTTONS.slice(0, 3);
            var rotateButtons = BUTTONS.slice(7, 9);
            var scaleButtons = BUTTONS.slice(9);
  
            if (!custom) {
              addClass(toolbar, getResponsiveClass(options.toolbar));
            }
  
            forEach(custom ? options.toolbar : BUTTONS, function (value, index) {
              var deep = custom && isPlainObject(value);
              var name = custom ? hyphenate(index) : value;
              var show = deep && !isUndefined(value.show) ? value.show : value;
  
              if (!show || !options.zoomable && zoomButtons.indexOf(name) !== -1 || !options.rotatable && rotateButtons.indexOf(name) !== -1 || !options.scalable && scaleButtons.indexOf(name) !== -1) {
                return;
              }
  
              var size = deep && !isUndefined(value.size) ? value.size : value;
              var click = deep && !isUndefined(value.click) ? value.click : value;
              var item = document.createElement('li');
  
              item.setAttribute('role', 'button');
              addClass(item, NAMESPACE + '-' + name);
  
              if (!isFunction(click)) {
                setData(item, 'action', name);
              }
  
              if (isNumber(show)) {
                addClass(item, getResponsiveClass(show));
              }
  
              if (['small', 'large'].indexOf(size) !== -1) {
                addClass(item, NAMESPACE + '-' + size);
              } else if (name === 'play') {
                addClass(item, NAMESPACE + '-large');
              }
  
              if (isFunction(click)) {
                addListener(item, EVENT_CLICK, click);
              }
  
              list.appendChild(item);
            });
  
            toolbar.appendChild(list);
          } else {
            addClass(toolbar, CLASS_HIDE);
          }
  
          if (!options.rotatable) {
            var rotates = toolbar.querySelectorAll('li[class*="rotate"]');
  
            addClass(rotates, CLASS_INVISIBLE);
            forEach(rotates, function (rotate) {
              toolbar.appendChild(rotate);
            });
          }
  
          if (options.inline) {
            addClass(button, CLASS_FULLSCREEN);
            setStyle(viewer, {
              zIndex: options.zIndexInline
            });
  
            if (window.getComputedStyle(parent).position === 'static') {
              setStyle(parent, {
                position: 'relative'
              });
            }
  
            parent.insertBefore(viewer, element.nextSibling);
          } else {
            addClass(button, CLASS_CLOSE);
            addClass(viewer, CLASS_FIXED);
            addClass(viewer, CLASS_FADE);
            addClass(viewer, CLASS_HIDE);
  
            setStyle(viewer, {
              zIndex: options.zIndex
            });
  
            var container = options.container;
  
  
            if (isString(container)) {
              container = element.ownerDocument.querySelector(container);
            }
  
            if (!container) {
              container = this.body;
            }
  
            container.appendChild(viewer);
          }
  
          if (options.inline) {
            this.render();
            this.bind();
            this.isShown = true;
          }
  
          this.ready = true;
  
          if (isFunction(options.ready)) {
            addListener(element, EVENT_READY, options.ready, {
              once: true
            });
          }
  
          if (dispatchEvent(element, EVENT_READY) === false) {
            this.ready = false;
            return;
          }
  
          if (this.ready && options.inline) {
            this.view();
          }
        }
  
        /**
         * Get the no conflict viewer class.
         * @returns {Viewer} The viewer class.
         */
  
      }], [{
        key: 'noConflict',
        value: function noConflict() {
          window.Viewer = AnotherViewer;
          return Viewer;
        }
  
        /**
         * Change the default options.
         * @param {Object} options - The new default options.
         */
  
      }, {
        key: 'setDefaults',
        value: function setDefaults(options) {
          assign(DEFAULTS, isPlainObject(options) && options);
        }
      }]);
      return Viewer;
    }();
  
    assign(Viewer.prototype, render, events, handlers, methods, others);
  
    return Viewer;
  
  })));